However, if the lock washer is compressed and leaking
A cast iron deep sump type oil pan is used, which allows
occurs, remove the oil pan and determine the cause of
the engine installation to have a longitudinal inclination
range from 0° to 20°.
Remove and Install Oil Pan
Remove the drain plug and drain the oil.
Remove the bolt and washer assemblies. Then
remove the oil pan and gasket.
Clean all of the old gasket material from the
cylinder block and the oil pan. Then clean the oil pan
with fuel oil and dry it with compressed air.
Inspect the cast oil pan for porosity or cracks.
Figure 1. Typical Deep Sump Type Oil Pan
Check for misaligned flanges or raised surfaces
surrounding the bolt holes by placing the pan on a
Install and tighten the drain plug to 25-35 lb-ft
surface plate or other large flat surface.
When installing the oil pan, use a new gasket
Fill the oil pan with new oil (refer to Pages 10-5-
and, starting with the center bolt on each side and
20 and 10-9-9) to the full mark on the dipstick. Then
working alternately toward each end of the pan, tighten
start and run the engine for a short period to check for
the bolts to 10-20 Ib-ft (14-27 N·m) torque. Do not
over-tighten the bolts. Once the bolts are tightened to
the specified torque, do not retighten them as it could be
Stop the engine and, after approximately twenty
detrimental to the current type oil pan gasket. If a leak
minutes, check the oil level. Add oil, if necessary.
should develop at the oil pan, check if the lock washer is
If not, the bolt may be tightened.